Designed and launched backend web applications to provide personal financial assets and financial analysis based on the data.
Managed and improved backend web applications to provide membership service of partners of Kakaopay.
Added new features for managing the new mobile application of a mobile game market to the admin website built with Ruby on Rails.
Designed and implemented API-Gateway & API servers for the game service of KakaoTalk (one of the most visited IM app. in South Korea).
Developed EPG module of the web application running on the browser of set-top box.
Modified UI and some features of a legacy GUI application layer of the set-top box.